若(x-2)2+y-4=0，则以x，y的值为两边长的等腰三角形的周长是_____

This is an old English saying. Do you know it before? It says that we must go to bed early and get up early in the morning. Then we should be healthy. We should also be rich(wealthy) and clever (wise).

This is true. The body must have enough sleep to be healthy. Children of a young age should have ten hours’ sleep every night. Children who don’t have enough sleep can’t do their work very well. They will not be wise and they may not become wealthy!

The body also needs exercise. Walking, running, jumping, swimming and playing games are all exercise. Exercise keeps the body strong.

Exercise also keeps the blood（血液） moving around inside the body. This is very important. Our blood takes food to all parts of our body. The head also needs blood. Exercise helps us to think better!

小题1:If a child doesn’t have 10 hours’ sleep every night, he _____.

A．will become wise

B．won’t do well in his work

C．will have to sleep in the daytime

D．can’t go to school in time小题2:A person needs exercise because ______.

A．it makes him healthy

B．he has a lot of homework to do

C．it doesn’t need time

D．it is fun to do exercise小题3:Exercise makes the _______ move quickly and smoothly.

A．body

B．blood

C．children

D．head小题4:Which of the following is not true?

A．Exercise is good for a person’s head

B．A student should have 10 hour’s sleep.

C．It’s good for you to get up early and go to bed early.

D．If you have enough blood, you’ll be wise

尽管象牙交易已被国际协议宣布为非法行为，一些钢琴的制造者，仍使用象牙来覆盖钢琴键，这些象牙通常通过非法手段获得。最近，专家们发明出一种合成象牙，不像早期的象牙替代物，这种合成象牙受到了全世界范围内钢琴家的好评。但是因为钢琴制造者从来不是象牙的主要消费者，所以合成象牙的发展可能对抑制为获得最自然的象牙而捕杀大象的活动没什么帮助。下面哪项如果正确，最有助于加强上述论述

A．大多数弹钢琴但不是钢琴家的人也可以轻易地区分新的合成象牙和质量较差的象牙替代物。

B．新型的合成象牙的颜色表面质地可以与任何一种具有商业用途的自然象牙的质地相媲芙。

C．其他自然产物，如骨头和乌龟壳无法成为自然象牙在钢琴键上的替代物。

D．自然象牙最普遍的应用是在装饰性雕刻品方面，这些雕刻品不但因为它们的工艺质量，而且因为它们的材料的真实性而被珍藏。

空压机气缸冷却水温以不低于（）℃为宜。

A．0

B．10

C．20

D．30

职业介绍机构的主要优点是（）

A、应聘者面广，很难形成裙带关系

B、需要一定的费用

C、应聘者的情况不够了解

D、不一定有需要岗位的合适人选

某市监狱管教员秦某受亲友之托，答应帮忙办理因故意伤害罪被判处有期徒刑10年(已执行8年)刘某的假释，秦某接受请托之后，伪造了证明材料，证明刘犯在狱中的表现符合假释条件。1999年秦某找到其在市法院工作的同学杜某，要求其裁定刘犯假释。杜某向秦某询问罪犯是否符合假释条件，秦某回答"没问题"。杜某说："我问的是材料真假。"秦某说："真假你别管，那人是我亲戚，保证出不了事；"于是杜某仅凭秦某上报的材料，为刘某作了假释裁定。事后秦某接受请托人的现金5万元。刘犯被假释出以后于 2000年3月因强 * * 罪被抓获归案。杜某的行为构成：( )

A．徇私枉法罪

B．徇私舞弊假释罪

C．私放在押人员罪

D．玩忽职守罪